package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.List;

@Service
@Slf4j
public class DishServiceImpl implements DishService {

    @Autowired
    private DishMapper dishMapper;

    @Autowired
    private DishFlavorMapper dishFlavorMapper;

    @Autowired
    private SetmealDishMapper setmealDishMapper;
    /*
     * @Description  新增菜品
     * @Param [dishDTO]
     * @return void
     **/
    @Transactional
    public void saveWithFlavor(DishDTO dishDTO) {
        Dish dish=new Dish();
        BeanUtils.copyProperties(dishDTO,dish);
//        向菜品表插入一条数据
        dishMapper.insert(dish);

//      获取插入数据之后生成的主键
        Long dishId = dish.getId();

        List<DishFlavor> flavors = dishDTO.getFlavors();
        if (flavors !=null && flavors.size()>0){
            flavors.forEach(dishFlavor -> {
                dishFlavor.setDishId(dishId);
            });
 //        向口味表插入n条数据
          dishFlavorMapper.insertBatch(flavors);

        }
    }

    /*
     * @Description  菜品分页查询
     * @Param [pageQueryDTO]
     * @return com.sky.result.PageResult
     **/
    public PageResult pageQuery(DishPageQueryDTO pageQueryDTO) {
        PageHelper.startPage(pageQueryDTO.getPage(), pageQueryDTO.getPageSize());
        Page<DishVO> page=dishMapper.pageQuery(pageQueryDTO);

        return new PageResult(page.getTotal(),page.getResult());
    }

   /*
    * @Description  菜品批量删除
    * @Param [ids]
    * @return void
    **/
    @Transactional
    public void deleteBatch(List<Long> ids) {
//        判断当前是否存在起售的菜品
        for (Long id : ids) {
           Dish dish=dishMapper.getById(id);
           if (dish.getStatus()== StatusConstant.ENABLE){
//         当前菜品在起售不能删除
               throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
           }
        }
//        判断当前菜品是否被套餐关联
        List<Long> setmealId = setmealDishMapper.getSetmealByDishId(ids);
        if (setmealId!=null && setmealId.size()>0){
//            菜品已被套餐关联
            throw new DeletionNotAllowedException(MessageConstant.DISH_BE_RELATED_BY_SETMEAL);
        }
//        删除菜品表中的菜品数据
        dishMapper.deleteByIds(ids);
//        删除菜品关联的口味数据
        dishFlavorMapper.deleteByDishIds(ids);


    }

    /*
     * @Description  根据菜品id查询菜品和口味
     * @Param [id]
     * @return com.sky.vo.DishVO
     **/
    public DishVO getByIdWithFlavor(Long id) {
        Dish dish = dishMapper.getById(id);
       List<DishFlavor> dishFlavors=dishFlavorMapper.getByDishId(id);
       DishVO dishVO=new DishVO();
       BeanUtils.copyProperties(dish,dishVO);
       dishVO.setFlavors(dishFlavors);
        return dishVO;
    }

    /*
     * @Description  修改菜品和口味数据
     * @Param [dishDTO]
     * @return void
     **/
    @Transactional
    public void updateWithFlavor(DishDTO dishDTO) {
        Dish dish=new Dish();
        BeanUtils.copyProperties(dishDTO,dish);
//        修改菜品信息
        dishMapper.update(dish);
//        删除旧菜品口味
        dishFlavorMapper.deleteByDishId(dishDTO.getId());
//        插入新的菜品口味
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if (flavors!=null && flavors.size()>0){
//            重新设置dishId
            flavors.forEach(dishFlavor -> {
                dishFlavor.setDishId(dishDTO.getId());
            });
            dishFlavorMapper.insertBatch(flavors);
        }


    }

    /*
     * @Description  修改状态
     * @Param [status]
     * @return void
     **/
    public void updateStatus(Dish dish) {

        dishMapper.update(dish);
    }

    /*
     * @Description  根据分类id查询菜品
     * @Param [categoryId]
     * @return java.util.List<com.sky.entity.Dish>
     **/
    @Override
    public List<Dish> list(Dish dish) {
        dish.setStatus(StatusConstant.ENABLE);
       List<Dish> list=dishMapper.list(dish);
        return list;
    }

    /**
     * 条件查询菜品和口味
     * @param dish
     * @return
     */
    public List<DishVO> listWithFlavor(Dish dish) {
        List<Dish> dishList = dishMapper.list(dish);

        List<DishVO> dishVOList = new ArrayList<>();

        for (Dish d : dishList) {
            DishVO dishVO = new DishVO();
            BeanUtils.copyProperties(d,dishVO);

            //根据菜品id查询对应的口味
            List<DishFlavor> flavors = dishFlavorMapper.getByDishId(d.getId());

            dishVO.setFlavors(flavors);
            dishVOList.add(dishVO);
        }

        return dishVOList;
    }
}
